This is to allow 'vim' correctly detect light/dark terminal to choose appropriate theme. Could we please put this into /etc/sudoers? Defaults env_keep += "COLORFGBG"
This bug appears to have been reported against 'rawhide' during the Fedora 24 development cycle. Changing version to '24'. More information and reason for this action is here: https://fedoraproject.org/wiki/Fedora_Program_Management/HouseKeeping/Fedora24#Rawhide_Rebase
This setting is up to user, everyone can make their own. Closing this.
> This setting is up to user, everyone can make their own. No, when we talk about innocent variable which is needed by significant portion of users, you don't want to bother community with manual configuration. However, the correct reasoning is that this is actually not needed for sudo on Fedora anymore, because modern vim is able to communicate background color with modern terminal (over terminal control sequences). So nowadays in Fedora, it is only worth passing COLORFG through ssh connections to older systems (unfortunately also to RHEL7).